Elastic-fluid motor.



W. F. BORN. ELASTIC FLUID MOTOR.

I APPLICATION FILED MAY 4, 1910. 1,008,781. v Patented Nov. 14, 1911.

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W. P; BORN.

' ELASTIC 'FLUID MOTOR.

APPLICATION FILED MAY 4, 1910.

Patented NOV. 14, 1911.

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W. F. BORN.

ELASTIC FLUID MOTOR.

\ APPLICATION FILED MAY 4, 1910.

Patented Nov. 14, 1911.

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17 rrni STATES PATENT OFFICE.

WALTER F. BORN, OF DOWNERS GROVE, ILLINOIS, ASSIG1\TOR OF FORTY-NINEONE- HUNDREDTHS TO ROBERT MIEHLE, OF CHICAGO, ILLINOIS.

ELASTIC-FLUID MOTOR.

Specification of Letters Patent. Patented NOV. 14, 1911.

Application filed May 4, 1910. Serial No. 559,380.

To all whom it may concern:

.Be it known that LNVALTER F. BORN, a citizen of the United States,residing at Downers Grove, in the county of Dupage and State ofIllinois, have invented certain new and useful Improvements in Elastic-Fluid Motors, of which the following is a specification.

fluid motor;

This invention relates toelastic fluid m0- tors and has for its primaryobject to provide an improved construction, combination and arrangementof parts in a rotary elastic One of the objects of this invention is toprovide improved means for delivering the elastic fluid to therotor ofthe machine.

' general assembly view of the motor com- More specifically, one of theobjects is to provide an lmpro'ved construction. and arrangement ofnozzles for elastic fluid motors.

'Another object is to provide improved packing means for the rotors ofmachmes of this nature.

Another more specific object is to provide improved means for packingthe individual cups of the rotor.

Another object is to provideimprovedmeans for mufliing the exhaust ofelastic Fig. 4. Fig. 3 is a section on the line III III, Fig. 4. Fig. 4is a vertical section on the line IVIV, Fig. 1. Fig. 5 is a section onthe line 'V-V, Fig. 2. Fig. 6 is a plete.

ings and to the embodiment shown therein, the rotor housing comprises acap portion 1, and a lower shell creasing 2, said housing being providedwith an intermediate partition or wall 3, (see Fig. 4 of the drawlngs).

As shown best in Figs. 1 and 4 of the drawings, .thecap 1 is providedabove with an inlet pipe 4 leading to-aninlet port 5 in a throttle valve6, said throttle valve be- Referring moreparticularly to the draw-.

ing provided above with a throttle lever 7 whereby it may be opened orclosed at will. Provided between the cap plate 1 and the partition wall3, is a fluid chamber 8 with which theport 5 of throttle valve 6communicatesby means of a vertical passage 9. Within the partition wall3, as shown best in Figs. 2 and 5, are provided a plurality of fluidconducting openings 10, which serve as inlets for the nozzles which areprovided in portions rigid with the partition wall 3, as will now bemore particularly described.

In order to provide nozzles of suitable form and arrangement whichwill'adapt the motor to operate in the manner to be hereinafter pointedout, said nozzles are preferably formed in a plurality of lugs or pro-'tuberances' 11, integrally formed with the said partition wall 3. Asshown most clearly in Fig. 5, said nozzles comprise the inlet openings10, which are preferably rounded in form leading to a supplemental fluidchamber 12, and a fluid outlet channel 13 which projects the fluiddirectly into the buckets passing therebeneath when the mo tor is inoperation.

I Referring more especially to Figs..3-and 4 of the drawings, the rotorof the machine comprises a spindle 14 suitably journaled above in thecap 1 and partition wall 3 and below in the lower wall of the casing,and a disk-shaped memberprovided around its outer periphery with aplurality of laterally opening buckets 15, forming an annulus extendingcompletely around the spindle 14.

Between 'thespindle 14 and the peripheral annulus formed by the buckets15, the disk of the rotor is provided with a plurality of perforations16, for a purpose presently to be explained. The lugs or protuberances11 of thepartition wall 3 are each provided with a depending flange 17within and a second flange 18 without said. annulus, said flangesproviding means for holding the fluid within the buckets during theirpassage under' the rotuberances 11. Each of the buckets 15 lsprovidedwith walls inclined rearwardly with reference to their direction ofmovement so that the fluid enteringfrom the nozzle outlet 13 hasimparted thereto as it enters the bucket a whirling movement.Furthermore, as the bucket passes out from under the protuberance orWithout the flat wall of the casing 2 the spindle 14 is provided with areduced portion' 22, upon which is keyed or'otherwise rigidly secured apinion 23 intermeshing with a gear 24, said gear 24 being rigidlysecured-to the chuck spindle for drlving the tool. Projecting inwardlyfrom the inner wall of the casing is a pin 25, preferably round. Thispin has'for its function to break up the fluid column within the casingin such manner as to muflie the exhaust. Preferably this pin projectsfrom the outer flat wall of the casing, and according to the presentembodiment of the invention, is rigidly secured to a leaf or closure 26by means of-a screw 27. Said closure 26 covers an opening 28 in thecasing, and as shown in dotted lines in Fig. 3, is 'pivotally mounted onthe outer wall of said casing by means of apivot screw 29. On the endopposite pivot screw 2'9v said leaf or closure is, provided with afinger grip 30, by means of which the closure may be oscillated on itspivot'to adjust the position of the mufliing pin 25,

and if desired to provide an auxiliary ex-- haust by uncovering theopening 28 to any desired extent. As shown in Fig. 6, a handoperatedchuck 31 is mounted on the outermost end of the spindle driven by thegear 24. The outer face of this chuck is knurled to permit-the same tobe adjusted in theusual manner.

Referring more especiall to Fi 3, 4 and 5' of the drawings, the elastic'l lld enters the inlet 4 and after going through the port 5 into thefluid ;chamber 8, passes through the inlet openings 10 of the severalnozzles and into the fluid chambers 12,being discharged from saidchambers 12 through the outlet nozzles 13 into the buckets 15.

Inasmuch as the elastic fluid is delivered to the machine under highpressure it will be fluid has imparted thereto a -whirling moevidentthat during the time in which a vane of the rotor is passing over theoutlet 13,- said outlet is closed witlv the result that the dynamicforceof the fluidentering through the inlet 10, is converted intopressure to provide a supplementary compression of the fluid.Immediately, the vane closing. the outlet 13 having passed said outlet,there is an expanding discharge into the next bucket 15 toverymaterially intensify the impulse umparted by the motive fluid. Inentering one-of the buckets 15 which is almost in-- stantly cut off fromthe fluid supply, the

tion by reason of the rearwardly inclined disposition of the walls ofthe buckets 15, and when the bucket has emerged from under the segmentalprotuberance '11, the inclination of the wall of the bucket causes thefluid 'to strike rearwardly' against the radial end wall of saidsegmental protuberance. Escaping from the buckets, the fluid now assesthrough the perforations 16 in isk portion of the rotor or down thethrough. the annular slots 33 between the buckets and the outercylindrical wall of the casing.

' Actual practice with a motor thus constructeddemon'strates that therotor moves axially in a: direction toward the nozzles,

whilein operation. This is a most advantageous and valuable function,because it results in automatic packing of the elements carying thebuckets and the nozzles and keeps them in perfect adjustment at alltimes without danger of either leakage or excessive pressure andobjectionable friction. This tendency of the rotor to thus move axiallywhile in operation toward the pres- 'sure which'drives it is due to thearrangement of the walls of the buckets at an oblique angle to the axisof the rotor, as better shown in Fig. 5, with their faces at an obtuseangle to the line of discharge from the nozzles, which of course resultsin the force of the fluid pulling the rotor toward the nozzles. Thistendency of the rotor to move axially under the influence of the fluiddischarging from the nozzles may be materially aided and governed to anicety by controlling the exhaust and thereby creating more or lesspressure on the side of the rotor opposite that to which the nozzles arepresented.

By an inspection of Fig. 4, it will be seen that the extent of thesurface of the lower or outer side of the rotor which is exposed to, thefluid; pressure escaping from the buckets is greater than-the surface ofthe opposite side thereof, since a portion of. t

latter side is covered by the segmental pro-.

tuberance under'which or againstwhich the buckets are driven. By reasonof this differencein area there will therefore be a resulting pressurein favor of the under or outerside of the rotor, andwhich, though it maynot be suflicient'in. itself to overcome the higher pressure of fluid inthe nozzles,

nevertheless resiststhe latter to a suflicient degree to enable thepulling tendency .of the fluid resulting from the described angleofimpingement against .the wall of the bucket to create a preponderance ofpressure towardthe nozzle and thereby keep the rotor in close workingfit with the protuberance in which the nozzle is formed. The wider theexhaust is opened, theless will be the cushion at the lower or outerside of the rotor,

and hence a'corresponding decrease in the pressure of the rotor againstthe segmental protuberances. It will also be seen that the fluid whichis trapped within one of the "mom-2.81

buckets "serves to "produce an additional packing action about the edgesof the buckets.

While the exemplification of the invention shown in the drawingsillustrates the embodiment of saidinvention in 3a hand tool for drivingdrills, reamers and the-"like, it will be readily understood that thecombina- -tion and arrangement of parts hereinbefore set forth areequally applicable to other ma chines embodying a rotor and housingtherefor.

What I claim is:

1. In an elastic fluid motor, the combination of a rotor provided withbuckets opening laterally, thereof and having walls arranged at anoblique angle to its axis, a housing provided with nozzles discharging.into said buckets against said walls each at an obtuse angle thereto,said rotor being movable axially, and provided with passages forconducting fluid to the other side of 'the rotor to resist the tendencyof the pressure of the fluid in the nozzles to force the rotor axiallyaway from the nozzles.

2. In an elastic fluid motor, the combination with a housing havingnozzles provided in a portion rigid with said housing, said nozzlesbeing provided with discharge orifices arranged in a plane," .a rotorhaving bucket-s opening laterally and adapted to successivelytraverse'said nozzle orifices, said buckets having walls arranged at anoblique angle to the axis of the rotor and each at an obtuse angle tothe line of discharge of the nozzles when in position to receive thedischarge from the nozzles whereby such discharge will pull the rotortoward the nozzles.

3. In an elastic fluid motor, the combination of a rotor provided withlaterally opendischarge from each nozzle as it comes into such line,said buckets being formed on one side of the rotor only whereby therotor will be free to be moved axially by the glancing action of thefluid discharging against the oblique walls of the buckets.

' 4. In an elastic fluid motor, the combination of a rotor provided withlaterally opened buckets forming an annulus around the periphery thereofand with a perforated web, a housing for said rotor provided with aprojecting portion slidably engaging said annulus and provided withflanges projecting from said portion on either side of said annulus, anda nozzle in said projecting portion;

5. In an'elastic fluid motor, the combination of a rotor provided withlaterally opened buckets. forming an annulus around the peripherythereof and with a perforated web,

a housing for said rotor provided with a projecting portion slidablyengaging said annulus and provided with flanges projecting from saidportion on either side of said annulus, and a nozzle in said projectingportion, said nozzle being provided with inlet and discharge openingsand an air compressioh chamber between said openings.

6.. Inan elastic fluid motor,the combina tion of a rotor provided with aplurality of buckets projecting laterally therefrom, a housing for saidrotor provided with a plurality of portions with radial end walls, saidportions successively closing said buckets, one of said portions beingprovided with a nozzle.

7. In an elastic fluid motor, the combination of a rotor provided with aplurality of buckets projecting laterally therefrom, a housing for said.rotor provided with a plurality of portions with radial end walls, saidportions successively closing said buckets, each of said portions beingprovided with a of the buckets.

8. In an elastic fluid motor, the combination of a rotor provided with aplurality of buckets projecting laterally therefrom, each of saidbuckets being rearwardly inclined, a housing for said rotor providedwith a plurality of annular segmental port-ions with radial-end walls,said portions successively closing said buckets and each having a nozzleprovided therein.

9. In an elastic fluid motor, the combination of a rotor provided with aplurality of buckets projecting laterally therefrom and provided withrearwardly curved walls, a housing for said rotor provided with aplurality of annular segmental portions with radial end walls, saidportions being adapted to successively close said buckets, and eachprovided with a nozzle, the curved walls of said buckets adapting saidbuckets to exhaust against the radial end walls of said segmentalportions.

'10. In an elastic fluid motor, the combination with a rotor providedwith buckets on one side, of a housing for said rotor provided with aprojection slidably engaging the bucket side of the rotor and cuttingoff a portion of the area thereof from the fluid pressure in thehousing, means for deliveringelastic fluid to said buckets, and meanswhereby the housing on one side of the rotor within the circle describedby the buckets nozzle inclined in the direction of movement fluidpressure in the housing, said housing being further provided with anexhaust port, means for delivering elastic fluid to said buckets, andmeans within the casing for mufiiing the exhaust.

12. In an elastic fluid motor, the combination of a housing, a rotorwithin the housing provided with exhaust passages through and around therotor,- and a projection on the inner wall of the housing'for breakingthe fluid columns to 'mufile the exhaust.

13. In an elastic fluid motor, the-combinae tion'of-a housing, a rotorwithin the housing provided with exhaust passages through and around therotor, and a pin adjustably mounted on the inner w'allof the housing formufiiing the exhaust.

14. In an elastic fluid motor, the combination of a-housing, a rotorwithinthe housing provided with exhaust passages through and around therotor, and a. pin adjustably mounted on the inner wall of the housingfor mufliing the exhaust, the wallof said housing being provided with anexhaust port.

15. In an elastic fluid motor, the combination of a rotorand a housingtherefor, said housing being provided with an exhaust outlet, and a pinwithin said housing for muf fling the exhaust.

16. In an elastic fluid motor, the combination of a rotor and a housingtherefor, said housing being provided with an exhaust outlet and anadditional opening, a closure for said opening adapted to adjust thesize of said additional opening, and a pin mounted on said closure andprojecting through the additional opening for mufliing the exhaust.

17. In an elastic fluid motor, the combination of a rotor provided withbuckets, of a housing for the rotor provided with a nozzle formedtherein, said nozzle comprising a fluid chamber, an inlet leading tosaid chamber, and a discharge leading from said chamber, said dischargebeing provided with an orifice of approximately the width of thebuckets- 18. In an elastic fluid motor, the combination of a rotorprovided with buckets projecting laterally therefrom, a housing for saidrotor provided with a partition transverse of the axis of said rotor andforming a fluid chamber above the artition, said partition beingprovided with depending lugs in slidable engagement-with said buckets,said lugs having formed therein nozzles for projecting the fluid intothe buckets, each ofsaid nozzles being provided with a secondary fluidchamber.

In testimony whereof I have signed my name to this specification, in.the presence of two subscribing witnesses, on thislst day of December A.D. 1909.

. WALTER F. BORN. Witnesses:

A. O. 'KNIGHT,-, C. H. SEEM.

